摘要
三维拟仿射变换是一种经典的图像加密算法,为了改善算法的加密效果及其安全性,在其基础上,提出一种新三维拟仿射变换图像加密算法。该算法将明文图像从左到右、从上到下、逐个像素地进行非线性扩散,同时将图像分成多个块,根据混沌序列的随机值加密相应的图像块。分析结果表明,新三维拟仿射变换图像加密算法的密钥空间非常大,运算速度快,安全性能好。
Three-dimensional quasi affine transform is a classical image encryption algorithm.In order to improve the encryption effect and security of the algorithm,a new three-dimensional quasi affine transform algorithm for image encryption is proposed on its basis.In this algorithm,the plaintext image is non-linearly diffused pixel by pixel from left to right and from top to bottom.At the same time,the image is divided into multiple blocks,and the corresponding image blocks are encrypted according to the random value of chaotic sequence.The analysis result shows that the new three-dimensional quasi affine transform image encryption algorithm has quite large key space,high operation speed and excellent security performance.
作者
周业勤
张辉
Zhou Yeqin;Zhang Hui(Shandong Police College Police Technology and Equipment Innovation Research Center,Jinan,Shandong 250000,China)
出处
《计算机时代》
2022年第2期31-35,共5页
Computer Era
